package com.yexs.common.handler;

import com.alibaba.fastjson.JSON;
import com.yexs.common.vo.Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.ConversionNotSupportedException;
import org.springframework.beans.TypeMismatchException;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.io.IOException;

/**
 * @Description: 全局异常拦截处理器（只拦截Controller的异常，Intercept的异常不拦截处理）
 * @Author: yexs
 * @CreateDate: 2018/5/29 14:55
 * @Version: 1.0
 */
@RestControllerAdvice
public class GlobalExceptionHandler {
    private static final String logExceptionFormat = "Capture Exception By GlobalExceptionHandler: Code: %s Detail: %s";
    private static Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    //运行时异常
    @ExceptionHandler(RuntimeException.class)
    public String runtimeExceptionHandler(RuntimeException ex) {
        return resultFormat(1, ex);
    }

    //空指针异常
    @ExceptionHandler(NullPointerException.class)
    public String nullPointerExceptionHandler(NullPointerException ex) {
        return resultFormat(2, ex);
    }

    //类型转换异常
    @ExceptionHandler(ClassCastException.class)
    public String classCastExceptionHandler(ClassCastException ex) {
        return resultFormat(3, ex);
    }

    //IO异常
    @ExceptionHandler(IOException.class)
    public String iOExceptionHandler(IOException ex) {
        return resultFormat(4, ex);
    }

    //未知方法异常
    @ExceptionHandler(NoSuchMethodException.class)
    public String noSuchMethodExceptionHandler(NoSuchMethodException ex) {
        return resultFormat(5, ex);
    }

    //数组越界异常
    @ExceptionHandler(IndexOutOfBoundsException.class)
    public String indexOutOfBoundsExceptionHandler(IndexOutOfBoundsException ex) {
        return resultFormat(6, ex);
    }

    //400错误
    @ExceptionHandler({HttpMessageNotReadableException.class})
    public String requestNotReadable(HttpMessageNotReadableException ex) {
        System.out.println("400..requestNotReadable");
        return resultFormat(7, ex);
    }

    //400错误
    @ExceptionHandler({TypeMismatchException.class})
    public String requestTypeMismatch(TypeMismatchException ex) {
        System.out.println("400..TypeMismatchException");
        return resultFormat(8, ex);
    }

    //400错误
    @ExceptionHandler({MissingServletRequestParameterException.class})
    public String requestMissingServletRequest(MissingServletRequestParameterException ex) {
        System.out.println("400..MissingServletRequest");
        return resultFormat(9, ex);
    }

    //405错误
    @ExceptionHandler({HttpRequestMethodNotSupportedException.class})
    public String request405(HttpRequestMethodNotSupportedException ex) {
        return resultFormat(10, ex);
    }

    //406错误
    @ExceptionHandler({HttpMediaTypeNotAcceptableException.class})
    public String request406(HttpMediaTypeNotAcceptableException ex) {
        System.out.println("406...");
        return resultFormat(11, ex);
    }

    //500错误
    @ExceptionHandler({ConversionNotSupportedException.class, HttpMessageNotWritableException.class})
    public String server500(RuntimeException ex) {
        System.out.println("500...");
        return resultFormat(12, ex);
    }

    //栈溢出
    @ExceptionHandler({StackOverflowError.class})
    public String requestStackOverflow(StackOverflowError ex) {
        return resultFormat(13, ex);
    }

    /**
     * 多文件上传异常
     *
     * @param e
     * @param redirectAttributes
     * @return
     */
    @ExceptionHandler(MultipartException.class)
    public ModelAndView multipartExceptionException(MultipartException e, RedirectAttributes redirectAttributes) {
        // 这样参数将存储在session中，不会直接显示在浏览器的地址栏上
        //在控制层可以通过RequestContextUtils.getInputFlashMap(request)来获取addFlashAttribute的值
        redirectAttributes.addFlashAttribute("message", e.getCause().getMessage());
        ModelAndView mv = new ModelAndView("redirect:/file/uploadStatus");

        //如果文件过大，导致超时，并不会 重定向mv的
        return mv;
    }

    //其他错误
    @ExceptionHandler({Exception.class})
    public String exception(Exception ex) {
        return resultFormat(14, ex);
    }

    private <T extends Throwable> String resultFormat(Integer code, T ex) {
        ex.printStackTrace();
        log.error(String.format(logExceptionFormat, code, ex.getMessage()));
        return JSON.toJSONString(Result.ERROR(code, ex.getMessage()));
    }
}
